class_docstr: Base class for row group indexers.
docstr: Return row groups for given value in index.
docstr_tok: ["Return","row","groups","for","given","value","in","index","."]
code: def get_row_group_indexes(self, value_key):
      """Return row groups for given value in index."""
      return None
  
file_path: petastorm/petastorm/etl/__init__.py
imports: import abc
  import six
label_desc: Use image node_id 5 for calling the RowGroupIndexerBase obj's underlying member method code with example usage: obj.get_row_group_indexes(value_key) and returns: None